Add a define for __builtin_ms_va_copy()

Signed-off-by: Michael Stefaniuc <mstefani@redhat.com>
Signed-off-by: Christopher Li <sparse@chrisli.org>
diff --git a/lib.c b/lib.c
index 58a7f2e..d5b56b0 100644
--- a/lib.c
+++ b/lib.c
@@ -970,6 +970,7 @@
 	add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 	add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 	add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
+	add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 	add_pre_buffer("#define __builtin_va_end(arg)\n");
 	add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 	add_pre_buffer("#define __builtin_va_arg_pack()\n");